Equity	3 Months Ended
Mar. 31, 2019
Equity [Abstract]
Equity	(7) Equity Convertible Note Indenture During the first quarter of 2018, in connection with our Restructuring (defined above), all of the outstanding 6.00% convertible senior unsecured notes due 2021 were converted or exchanged into shares of our common stock, and the Indenture governing such notes was discharged. On January 17, 2018, the Investors converted a $1.6 million aggregate principal amount of 6.00% convertible senior unsecured promissory notes due in 2021, which were issued effective January 17, 2017, plus accrued and unpaid interest, into 189,645 shares of our common stock. On February 14, 2018, an additional $70.3 million aggregate principal amount of notes, plus accrued and unpaid interest, were exchanged for 10,401,309 newly-issued shares of our common stock. Private Placement SPA On February 14, 2018, we sold to the Investors, pursuant to the Private Placement SPA, 945,819 shares of our common stock at a price of $7.20 per share for aggregate proceeds of $6.8 million. Registration Rights Agreement On May 15, 2018, we filed a shelf resale registration statement with the SEC pursuant to our obligations under the Registration Rights Agreement. This registration statement was declared effective by the SEC on June 4, 2018. Rights Offering On May 18, 2018, we distributed to holders of our common stock, at no charge, non-transferable subscription rights to purchase up to an aggregate of 1,137,515 shares of our common stock (the “Rights Offering”). In the Rights Offering, holders received 0.0869816 subscription rights for each share of common stock held on the record date, April 27, 2018. The units were priced at $7.20 per unit. The Rights Offering expired on June 18, 2018, at which time the rights were no longer exercisable. We issued 129 shares of our common stock in the Rights Offering, resulting in $0.9 thousand in gross proceeds to us.

Equity

3 Months Ended

Mar. 31, 2019

(7) Equity

Convertible Note Indenture

During the first quarter of 2018, in connection with our Restructuring (defined above), all of the outstanding 6.00% convertible senior unsecured notes due 2021 were converted or exchanged into shares of our common stock, and the Indenture governing such notes was discharged. On January 17, 2018, the Investors converted a $1.6 million aggregate principal amount of 6.00% convertible senior unsecured promissory notes due in 2021, which were issued effective January 17, 2017, plus accrued and unpaid interest, into 189,645 shares of our common stock. On February 14, 2018, an additional $70.3 million aggregate principal amount of notes, plus accrued and unpaid interest, were exchanged for 10,401,309 newly-issued shares of our common stock.

Private Placement SPA

On February 14, 2018, we sold to the Investors, pursuant to the Private Placement SPA, 945,819 shares of our common stock at a price of $7.20 per share for aggregate proceeds of $6.8 million.

Registration Rights Agreement

On May 15, 2018, we filed a shelf resale registration statement with the SEC pursuant to our obligations under the Registration Rights Agreement. This registration statement was declared effective by the SEC on June 4, 2018.

Rights Offering

On May 18, 2018, we distributed to holders of our common stock, at no charge, non-transferable subscription rights to purchase up to an aggregate of 1,137,515 shares of our common stock (the “Rights Offering”). In the Rights Offering, holders received 0.0869816 subscription rights for each share of common stock held on the record date, April 27, 2018. The units were priced at $7.20 per unit. The Rights Offering expired on June 18, 2018, at which time the rights were no longer exercisable. We issued 129 shares of our common stock in the Rights Offering, resulting in $0.9 thousand in gross proceeds to us.